The architectural ghost: why the number 13 is missing from our skyscrapers

Cultures · Published 1 October 2026 · Updated 24 October 2026 Swipe more like this →

In short: From London's Fleet Street to elevator panels in New York, the number 13 is frequently absent. While many attribute this to ancient curses or religious betrayals, the reality is a complex blend of social convention, real estate anxiety, and even modern urban planning.

Triskaidekaphobia—the fear of the number 13—is often linked to the Last Supper, where the 13th guest was Judas. However, historical evidence for this origin is thin; the earliest documented instances of 13 being considered unlucky appear in Europe after the Middle Ages. Other theories point to Norse mythology, specifically the uninvited 13th guest, Loki, at a feast in Valube, though the original Prose Edda by Snorri Sturluson does not actually emphasize the number 13 in that story.

The phenomenon has profound physical impacts on our built environment. In many high-rise buildings, the 13th floor is simply skipped, or rebranded as '12A', 'M', or a 'mezzanine'. An internal review by Otis Elevators in 2002 estimated that 85% of buildings with 13 or more floors using their elevators did not feature a floor named the 13th. This practice is so widespread that some cities, like Vancouver, have banned the practice of skipping numbers to ensure first responders can navigate buildings accurately during emergencies.

The economic implications are equally nuanced. While some American developers claim no impact on property values, studies in Russia suggest that 13th-floor apartments are harder to sell unless offered a discount of 10% or more. Interestingly, the superstition is not universal. In Cantonese-speaking regions like Hong Kong, 13 is actually lucky because it sounds like the phrase for 'sure to live,' whereas 14 is avoided because it sounds like 'sure to die'.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• Why the world's tallest buildings are often defined by a secret spire
• Why millions of people avoid the number four like a death sentence
• Why a city of ten thousand built the world's tallest church spire
• How a failed skyscraper project became the second tallest building in the United Kingdom
• Why medieval architects pushed stone to its breaking point with the soaring church spire
• The Roman ghost haunting the Slavic throne: where the title Tsar truly began
• The mythic divide between 'pure' and 'Arabized' lineages in Arabian history
• How a small British studio defined the Lego video game empire for two decades
• The kissing bug does not transmit disease through its bite, but through its waste.
• The Tudor rose was a clever piece of political propaganda
• Trey McBride is rewriting the record books for NFL tight ends
• Why do two major parties dominate the political landscape in so many countries?

More in Peoples & civilisations · More in Cultures · Latest · A–Z · All topics